CN100436781C - System and method for water pasteurization and power generation - Google Patents
System and method for water pasteurization and power generation Download PDFInfo
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- CN100436781C CN100436781C CNB2003801035830A CN200380103583A CN100436781C CN 100436781 C CN100436781 C CN 100436781C CN B2003801035830 A CNB2003801035830 A CN B2003801035830A CN 200380103583 A CN200380103583 A CN 200380103583A CN 100436781 C CN100436781 C CN 100436781C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
A system and method for creating power and pasteurizing water is provided. The system includes a power generation subsystem and a water pasteurization subsystem, which are linked together as follows. The power generation subsystem comprises a turbine power generator. Air (or other suitable working fluid) flows through the turbine power generator to generate power by known methods. The air is heated prior to flowing into the turbine to increase its speed for greater power generation. The water pasteurization subsystem includes one or more heat exchangers, at least one of which is connected to receive the hot airflow exiting the turbine. The heat from the turbine-exiting airflow is utilized for pasteurizing colder wastewater inside the heat exchanger.
Description
Technical field
The present invention relates generally to water purification, specifically relates to the pasteurization and the turbine generation of water.
Background technique
The conventional method that is used to purify liquid waste comprises chlorination treatment, be exposed to ultraviolet ray (UV) radiation and ultrafiltration.Regrettably, all there is defective in each of these methods.
Chlorination treatment relates to chlorine or chloride to be handled water.If cl concn is enough big, the then treated water capacity is prone to bad aroma and flavor.Some just dislike the aroma and flavor of very small amount of chlorine.In addition, chlorination treatment is harmful to people's health.If the water source comprises the humus of formation as the part of organic material (for example leaf, grass, timber or animal waste) decomposition, this water is carried out chlorination treatment can produce haloform (THMs).Because THMs seldom occurs in underground water, so they mainly relate to when using earth surface water source.Environmental protection general administration thinks that continuing to drink its THMs content understands carcinogenic greater than the water source of 0.10 mg/litre.
By being exposed to UV-b radiation water is handled more complicated and troublesome maintenance.It relates to uses the UV lamp, and these lamps must regularly replace.UV handles and also often utilizes reflector that UV light is assembled towards water.These reflectors must clean every now and then.Also have, generally needing the current through the UV process chamber is laminar flow, to promote the uniformity of UV exposure.This need use deflection plate and custom-designed process chamber, and this has just increased cost.
Filtration relates to makes water flow through a series of filters.The same with the UV processing, filter troublesome maintenance.These filters must cleaned at regular intervals and/or replacing.In addition, filter often a process slowly.
Pasteurization is the another kind of known method of purifying waste water.It relates to and heats water to 150-170 temperature at least.Pasteurization hour is carried out in the water yield usually, for example in campsite and other remote rural locations.Sometimes adopt small portable solar energy water pasteurization device or solar cooker to utilize solar thermal energy with water sterilization.In general, because the expense of the big water gaging of heating is very high, so do not adopt pasteurization for extensive water treatment.
Summary of the invention
The preferred embodiments of the invention are recognized the new chance that combines between the generating that the complete difference in front can be carried out and the water pasteurization method.Shown embodiment has adopted the hot waste gas from turbine generation that big water gaging is carried out pasteurization.
In one aspect, the system that the invention provides a kind of produce power and water is carried out pasteurization, it comprises a turbo machine, a generator, a heat exchanger and a thermal source.Turbo machine is formed into and is used for receiving working fluid stream, and working fluid stream is set at blade and the output shaft rotation that is used for making turbo machine.Generator is connected with the output shaft of turbo machine and is configured to be used for the rotation of output shaft is transformed into energy.Heat exchanger has first and second internal chamber.First chamber is configured to receive the working fluid that leaves turbo machine, and second chamber is configured to receive water, for example being untreated or even the waste water that is heated of part from municipal wastewater ponds.These chambers of heat exchanger are configured to allow carry out heat exchange between working fluid in first chamber and the water in second chamber.Heat is made the colder relatively water of direction of flow preferably water temperature is increased to water pasteurization temperature at least from the thermal technology.Thermal source is configured to the working fluid heating to first chamber of flow through turbo machine and heat exchanger.Usually, thermal source is to the working fluid heating that is positioned at the heat exchanger upstream.In preferred embodiments, thermal source applies heat to the working fluid that is positioned at turbine upstream and downstream.
In one aspect of the method, the invention provides a kind of system of producing electric energy and water being carried out pasteurization of being used to, it comprises a turbogenerator and a heat exchanger.Turbogenerator is configured to be used for working fluid circulation becoming electric energy.Heat exchanger has first and second internal chamber of separating on fluid." separating on the fluid " here is used for representing being arranged to not allow the fluid in these chambers to mix chamber.First internal chamber is configured to receive the working fluid discharge currents from turbogenerator, and second internal chamber is configured to receive water.These chambers are configured to allow carry out heat exchange between working fluid in first chamber and the water in second chamber, thereby preferably in second chamber water are carried out pasteurization.In aspect narrow sense more, this system also comprises and is configured to be used for applying to the working fluid that flows to turbogenerator the thermal source of heat.
In a further aspect, the method that the invention provides a kind of produce power and water is carried out pasteurization.At first produce electric energy in the mode that generates heat; Utilize described heat by described heat being carried in first chamber that is heated two internal chamber of on fluid, separating that enter into heat exchanger in the fluid, described chamber is configured to allow carry out heat exchange being heated between the waste water in fluid and second chamber in these two chambers in first chamber, and the temperature that is heated fluid in first chamber is higher than the temperature of waste water being carried out pasteurization; Allow waste water flow through second chamber of described heat exchanger, the temperature of described waste water is lower than the pasturisation temp of waste water during beginning; The waste water of second chamber of flowing through is absorbed from the heat that is heated fluid that is positioned at first chamber; Control flows is through the flow velocity of the waste water of second chamber of described heat exchanger, thereby the temperature that makes waste water is increased to the pasturisation temp of waste water, and make the heated waste water in described heat exchanger carry out pasteurization, wherein, described heat exchanger is second heat exchanger, and described method also comprises: make waste water flow first chamber in two internal chamber of separating on fluid of first heat exchanger without pasteurization from waste water source, and make in second chamber that is present in described second heat exchanger be heated and through second chamber of waste water flow in two chambers of described first heat exchanger of pasteurization, the chamber of described first heat exchanger be configured to allow in first chamber of this first heat exchanger without being heated and between the waste water of pasteurization, carrying out heat exchange in second chamber of pasteurization waste water and this first heat exchanger, and first chamber of described first heat exchanger that allows to flow through without pasteurization waste water being heated and absorbing heat in second chamber of this first heat exchanger through the waste water of pasteurization; And interior the flowing in second chamber of second heat exchanger from first heat exchanger of first chamber that makes described first heat exchanger, thereby this waste water without pasteurization was partly heated before entering second heat exchanger without pasteurization waste water.
In aspect another, the invention provides a kind of method that produces electric energy and water is carried out pasteurization.Turbogenerator is passed in the air pumping.Air makes turbogenerator produce electric energy.After air left turbogenerator, heat fed water from transfer of air, thereby made water temperature be increased to water pasteurization temperature at least.
In order to summarize the present invention and to be better than the advantage of prior art, purposes more of the present invention and advantage are illustrated in the above and will further specify below.Certainly, should be understood that any specific embodiments according to the present invention needn't realize all these purposes or advantage.Therefore, for example one of skill in the art will recognize that can be according to realizing or optimizing as an advantage that goes out shown here or one group of advantage and needn't realize going out or the present invention is implemented or realized to other purpose of suggestion or the mode of advantage as shown here.
All these embodiments all are in the disclosed here scope of the present invention.To readily understand these and other embodiment of the present invention the following detailed description of the preferred embodiment that those of ordinary skills provide from the reference accompanying drawing, the present invention is not limited to disclosed arbitrarily concrete preferred embodiment here.
Description of drawings
Fig. 1 illustrates according to the water pasteurization of the preferred embodiment of the invention and the flow chart of power generation system;
Fig. 2 is the schematic representation of the heat exchanger that uses in the preferred embodiment of the invention;
Fig. 3 is that show wherein will be from the digestion gas of waste water as the flow chart in one embodiment of the invention of the additional heating source at pipe burner place; And
Fig. 4 is the flow chart that shows wherein one embodiment of the invention that the digestion gas from waste water mixes with natural gas fuel source.
Embodiment
A kind of known method that is used to produce electric energy is to allow fluid for example steam or gas pass turbogenerator with flow at high speed.Turbogenerator generally includes the turbo machine that is connected with generator.This turbo machine comprises turbine blade and output shaft.Generator generally comprises the axle that can be connected with the turbo machine output shaft.Generator shaft is equipped with the magnet that is used for axle is transformed into electric energy.Usually, make working fluid be in the overheated gas state and pass this turbo machine to impel in higher speed current downflow.Fluid flows and passes turbine bucket so that turbo machine and generator shaft rotation.The motion subsequently of the electromagnetic field of magnet produces electric current.Generator generally comprises the optional equipment that is used to collect and store the energy that is produced.The equipment and the method that also have more meticulous manufacturings that are used to generate electricity based on these basic principles.
The heat that the working fluid after the turbogenerator has been left in the preferred embodiments of the invention utilization comes water is carried out the sterilization of crust formula.Therefore, the preferred embodiments of the invention are recognized the jointing machine meeting between conventional electric generators and water pasteurization.
Fig. 1 shows according to the water pasteurization of the preferred embodiment of the invention and the flow chart of power generation system 5.This system 5 comprises water pasteurization subsystem 6 and power generation sub-system 8, and each system is all represented by the dotted line among Fig. 1.As described below the same, water pasteurization subsystem 6 reception waste water effluents 12 and output are through the water purification 30 of pasteurization.Simultaneously, power generation sub-system 8 bears electric energy from the overheated working fluid miscarriage as air or water (but being preferably air) of passing turbogenerator 61.Advantageously, as described below the same, water pasteurization subsystem 6 has been utilized the heat of discharging from power generation sub-system 8, and this is easy and power generation sub-system 8 separated portions energy, thereby produces synergy between these two subtense angles.
This specification elder generation illustrates the operation of this system afterwards from the explanation of the structure member of this system 5.
The critical piece of water pasteurization subsystem 6 is first heat exchanger 16, second heat exchanger 20 and storage vessel 24.This subtense angle 6 also comprises a plurality of flow channels of connecting of being used between these parts.To the structural configuration of this subtense angle 6 be described now.
Fig. 2 is the schematic representation that is applicable to the heat exchanger 80 of the preferred embodiment of the invention.Specifically, this heat exchanger 80 is suitable as at first heat exchanger 16 shown in Fig. 1 and/or second heat exchanger 20 (described below) and any as requested added heat exchange machine.This heat exchanger 80 comprises two internal chamber A that separate and B on fluid, and has the interface 82 that these chambers are separated.This heat exchanger 80 comprises inlet 84 and 88 and export 86 and 90.This chamber A is connected with outlet 88 with inlet 84, and chamber B is connected with outlet 90 with inlet 88.Though Fig. 2 is shown as two-dimensional representation, should be understood that this heat exchanger 80 is three-dimensional structure.Thereby these chambers A and B are three-dimensional chambers.Though chamber B demonstrates with two parts, should be understood that chamber B is a continuous cavity as chamber A.Though the interface 82 of this schematic representation is shown as two simple linear line segments, should be understood that this interface 82 is formed at preferably between chamber A and the chamber B that to form very big contact surface long-pending, thereby promote that more heat is transmitted between them.These two chambers separate on fluid.Therefore, fluid 1 can by enter the mouth 84 and outlet 86 flow and to pass chamber A, and fluid 2 can by enter the mouth 88 and outlet 90 flow and pass chamber B, and these two kinds of fluids any mixing can not occur in heat exchanger 80.
Continuation is with reference to Fig. 1, and second heat exchanger 20 is as described below equally to be connected with two air-flow paths with two water flow channel.The same with first heat exchanger 16, second heat exchanger 20 comprises two internal chamber of separating on fluid.First chamber is used as at preheating water circulation road 18 and the pipeline between pasteurization flow channel 22.Second chamber is as the pipeline between air-flow path 66 and air-flow discharge route 68.Though do not demonstrate, two chambers of second heat exchanger 20 are as preferably being configured to be used for improving the heat exchange between the fluid in these two chambers known in the heat exchanger field.Preferably, these two chamber configuration are become to have very big contact surface each other long-pending to promote that carrying out more heat between them transmits.
Through pasteurization water flow channel 22 as the pipeline between second heat exchanger 20 and storage vessel 24.One in pasteurization water flow channel 26 internal chamber that equally makes storage vessel 24 and first heat exchanger 16 as described above is connected.The one or more of the water flow channel of pasteurization subtense angle 6 can be insulated wholly or in part to prevent thermal loss or gain.In one embodiment, all flow channels all are insulated.Certainly, preferably between these chambers in each heat exchanger without any insulation.
The critical piece of power generation sub-system 8 is fuel source 42 (being preferably rock gas), gas compressor 46, pump 41, gas ignition chamber 50, turbogenerator 61 and pipe burner 64.This subtense angle 8 also comprises a plurality of flow channels of connecting of being used between these parts.Structure to this subtense angle 8 describes now.
The fluid output of turbo machine 56 is connected with pipe burner 64 by " discharge " air-flow path 62.Leave the air-flow that turbo machine 56 enters air-flow path 62 and be called as " turbine exhaust gas " sometimes here.Pipe burner 64 also is connected with the said flow passage 66 that leads to second heat exchanger 20.Also the air-flow discharge route 68 that is connected with second heat exchanger 20 leads to and is used for the flue 70 to the external world with gas row.The same as known in the art, the air quality that continuous blow-down monitoring (CEM) system 72 monitors in air-flow discharge route 68 preferably is set.Can be with the one or more complete or minor insulation in the air-flow path of power generation sub-system 8 to prevent thermal loss or gain.In one embodiment, all flow channels all are insulated.
To the operation according to the whole system 5 of the preferred embodiment of the invention be described now.As mentioned above, power generation sub-system 8 is transformed into electric energy with overfire air stream.Preferably will equal or near the air 40 pumping air inlet body ignition chamber 50 of room temperature (as 59) by air-flow path 52.Simultaneously, the rock gas that is approximately 100psig flows to gas compressor 46 by compressed gas flow channel 44 not from gas fuel source 42.(for example, 318psig), thereby this gas will have the calorific capacity that increases greatly to this compressor 46 when lighting to higher pressure with gas compression.This superheated steam flows to gas ignition chamber 50 by compressed gas flow channel 48.In gas ignition chamber 50, pressurized natural gas is mixed with air 40.Natural gas igniting device (not shown) is lighted pressurized natural gas in the presence of air 40, thereby a large amount of heat release are advanced in the air.As a result, make the air in gas ignition chamber 50 enter superheated, pressurized gaseous state.In this case, overheated gas (comprising the smoke evacuation that comes by lighting) flows to turbo machine 56 at a high speed by turbine inlet air-flow path 54.High speed overfire air stream makes turbine blade rotation, thereby output shaft 58 is rotated.Generator 60 is transformed into electric energy with this rotation in the manner described above.
After overfire air was flowed through turbo machine 56, it continued to enter pipe burner 64 by discharging air-flow path 62.This pipe burner 64 passes through not, and compressed gas flow channel 44 receives rock gases.In an optional embodiment, pipe burner 64 can receive the flow of the compressed gas from compressed gas flow channel 48.The same with gas ignition chamber 50, this pipe burner 64 preferably includes the natural gas igniter (not shown), for example sparker, flame generating means or other similar device.In pipe burner 64 inside, natural gas igniting is applied extra heat to it during with one in two internal chamber that flow to second heat exchanger 20 at air by air-flow path 66 forward.Though it is preferred, dispensable it being understood that pipe burner 64.In second heat exchanger, 20 inside, air is owing to carry out heat exchange and obviously cooling with colder water as described below.Cooling air leaves second heat exchanger 20 by air-flow discharge route 68.Cooling air is discharged to the external world by chimney 70.
For allow compliance with emission standards, second heat exchanger 20 preferably includes and was used for before air is discharged into the external world by chimney 70 catalyzer that its is purified.Preferably, utilize selection catalytic reduction (SCR) catalyzer that nitrogen oxide (Nox) effulent is reduced.The SCR catalyzer can for example amino or urea-based compound be used in combination with reducing agent.Also can use as known in the art other catalyzer for example the CO catalyzer with allow compliance with emission standards.As mentioned above, CEM system 72 preferably is used for monitoring by stack emission and advances air quality in the surrounding environment to guarantee allow compliance with emission standards.
In operation, water pasteurization subsystem 6 is carried out pasteurization by waste water 12 being flowed pass heat exchanger 16 and 20 with wastewater effluent 12.Before entering water pasteurization subsystem 6, wastewater effluent 12 is in or near room temperature (for example, 60-66 °F).Waste water 12 flows in two internal chamber of first heat exchanger 16 by waste water input flow channel 14.Though not shown, pump can be set waste water 12 pumpings are advanced to import flow channel 14.Optionally, waste water 12 can only for example flow to input flow channel 14 by the collecting container that is vertically set on first heat exchanger, 16 tops by gravity.In some structures, filter can be set before waste water flows to first heat exchanger 16, from waste water 12, bigger chip be filtered out.
It being understood that to have other to be used for from the heat transferred of the turbine exhaust gas waste water without pasteurization.For example, the waste water from heat transferred first heat exchanger 16 inside of turbine exhaust gas that is used in second heat exchanger 20 can randomly be set.Also can adopt other heat exchange structure and system.
In one in two internal chamber of first heat exchanger 16, waste water absorbs from another the heat through the water of pasteurization (below described) of heat that is positioned at these two chambers.This make the temperature of waste water be increased to pasteurization or near pasturisation temp (for example, preferably be at least 130 °F, more preferably at least 135 °F and be preferably 140-148 °F).Jia Re water is by one in two internal chamber of preheated water flow channel 18 inflows second heat exchanger 20 then.In second heat exchanger 20, water absorbs extra heat from the hot air of another internal chamber of the heat exchanger 20 of flowing through.This causes water temperature further to be increased to pasteurization level (for example, being preferably 150-170, more preferably at least 160, and be preferably 160-161).Water through pasteurization flows to storage vessel 24 through pasteurization water flow channel 22.It being understood that storage vessel 24 can be from design deletion or move to output water flow channel 28 downstreams, with collecting container as subsequent stage.Continue not comprise internal chamber through the water of pasteurization from the input waste water effluent 12 of waste water input flow channel 14 by what enter first heat exchanger 16 through pasteurization water flow channel 26.As mentioned above, hot pasteurized water is given colder waste water 12 with heat, thereby makes through the temperature decline of pasteurized water, preferably gets back to roughly room temperature (for example, 76).That cools off leaves first heat exchanger 16 as cleaning output water 30 by water purification output flow channel 28 through pasteurized water.
What it is also understood that is, is provided preferably with to be used for the flow dontroller of control flows through the flow velocity of the water of second heat exchanger 20.Preferably, so control flows is through the water of second heat exchanger 20, that is, this water can absorb enough heats from turbo machine discharge air-flow, thus a period of time that its temperature is increased to water pasteurization temperature and continues to be enough to this water is carried out pasteurization.
In a preferred embodiment, from gas fuel source 42 and be in gas fuel in the compressed gas flow channel 44 not for about 100psig and the energy of about 7.1MMBtu/hr is provided.In gas compressor 46 with gas compression after, this gas is preferably about 318psig and the energy of about 74.6MMBtu/hr is provided.In one embodiment, turbogenerator 61 is by Solar Turbines of San Diego, the TAURUS 70-T10301S that CA sells.In height, the room temperature of 200 feet of the above height above sea level in sea level is that 59 and humidity are that this its total output of concrete turbogenerator is output as 7.160MW under 60% the condition.Under all these conditions, its flow velocity of the turbine exhaust gas in air-flow path 62 is approximately 210, and 044lb/hr and its temperature are approximately 916 °F.Preferably, the additional heat that imposes on the air in pipe burner 64 from the rock gas pressurized airflow path 44 not makes gas temperature arrive about 1034 °F.In preferred embodiments, its temperature of cooling air of leaving second heat exchanger 20 is approximately 250 °F, and to be approximately 210, the speed of 385lb/hr flows out from chimney 70.
In this preferred embodiment, with heat exchanger 16 and 20 and the size of storage vessel 24 and structure be arranged to every day and can carry out pasteurization about 1,000 ten thousand gallons wastewater effluent 12.In a further preferred embodiment, the size of this system and structure are arranged to every day and can carry out pasteurization the twice of above-mentioned amount.It will be appreciated by those skilled in the art that can be by the capacity of following manner adjust system 5: change heat exchanger 16 and 20 size and amount of heat transfer, change storage vessel 24 and water flow channel size, select different gas fuels and/or selection to have the turbogenerator that different turbo machines are discharged stream conditions with different heating ability.In preferred embodiments, heat exchanger is configured to preferably be at least 5,000,000, more preferably be at least 1,000 ten thousand, preferably be at least 1,500 ten thousand and preferably be at least 2,000 ten thousand gallons waste water again for pasteurization every day.
In preferred embodiments, water remain on preferably be at least under the pasturisation temp 2 seconds, more preferably preferably be at least again 10 seconds at least 5 seconds, and be preferably at least 15 seconds.In general, water temperature is high more, and required time of pasteurization is few more.Preferably under at least 160 temperature with water pasteurization at least 5 seconds.Under 200 °F, the pasteurization time is preferably at least two seconds.Water pasteurization temperature (that is the temperature of the water in water flow channel 22) is preferably 150-212 °F and more preferably 155-200 °F.It is desirable carrying out disinfection in 150-170 scope, because higher temperature needs power generation sub-system 8 to produce more heats, this will increase cost conversely and/or reduce throughput rate.Water pasteurization temperature preferably is at least 160 °F.
The present invention is expected at has special advantage and practicability on the city level.The invention enables municipality on cost the benefit mode produce energy and on the spot water carried out pasteurization.The energy that is produced can replenish the energy of buying from bigger power company.Water through pasteurization can be used for local the use.As in locality or the use of city level place, the turbo machine 56 of water pasteurization and power generation system 5 is preferably relative reduced size.In one embodiment, turbo machine 56 can produce the power that can reach 50MW, and more preferably produces the power that can reach 1000MW.In a preferred embodiment, water pasteurization and power generation system 5 energy that whenever produces 1MW can be handled about 200,000 gallons water.The energy that this system 5 preferably whenever produces 1MW can be handled at least 100,000 gallon and more preferably be at least 500,000 gallons water.This system 5 preferably whenever produces the energy of 1MW can handle 200,000-1,500,000 gallons water.In a preferred embodiment, this system energy of whenever producing 1MW can be handled 1.4 hundred ten thousand gallons water.
Those of ordinary skill will be appreciated that this water sterilization subtense angle 6 needn't comprise two heat exchangers going out as shown here.For example, can discharge air-flow (for example, eliminate first heat exchanger 16 and waste water 12 is directed immediately into second heat exchanger 20) waste water 12 is carried out pasteurization by using single heat exchanger to receive turbo machine.But two heat exchangers are preferred, because this has obviously increased the pasteurization capacity of subtense angle 6.If use single heat exchanger, it must make the temperature of waste water 12 be elevated to 150-170 pasturisation temp at least from room temperature or near room temperature, increases about 100 °F.So many in order to elevate the temperature, the water velocity of the necessary single heat exchanger of restricted passage absorbs enough heats thereby make water discharge air-flow from turbo machine.In single heat exchanger configuration, estimate that the energy that this system whenever produces 1MW can carry out pasteurization to 250,000 gallons water.But, waste water 12 can be preheated to about 140 °F by two heat exchangers, 16,20, first heat exchanger 16 shown in utilizing.Like this, 20 need of second heat exchanger make 10-31 of water temperature rising (preferably to 150-171, preferably to 160-161).This can allow higher water velocity.Can sterilize 1.4 hundred ten thousand gallons water of the energy that estimate to adopt this systems 5 of two heat exchangers whenever to produce 1MW.Adopt another benefit of two heat exchangers to be, be cooled near room temperature through the water of pasteurization.Though shown embodiment has been used two heat exchangers, those of ordinary skill will be appreciated that this system 5 can comprise any amount according to the heat exchanger that is connected in series in the mode shown in Fig. 1.
Though shown embodiment adopts rock gas to heat the air that flows to and leave turbogenerator, it being understood that also and can obtain these benefits of the present invention by adopting optional heating source (for example nuclear energy or coal combustion).It being understood that the energy that can adopt arbitrary form heats the air that flows to and leave turbogenerator.
Continuation is with reference to Fig. 1, and this water pasteurization and power generation system 5 can be used to hang oneself the what is called " digestion gas " of waste water of preheating and oxidation as the fuel source of the working fluid that is used to heat power generation sub-system 8.Preferably, before waste water 12 enters first heat exchanger 16 with its preheating and oxidation.Preheating and oxidation promote bacterial growth and make waste water discharge digestion gas, be generally methane gas.When igniting, digestion gas can apply extra heat to working fluid.
Fig. 3 demonstrates and utilizes the embodiment of digestion gas as the system of the present invention of the additional heating source of the working fluid that is used for power generation sub-system, wherein digestion gas is sent into pipe burner 64.In advance waste water 12 is collected in chamber or the container 95.As mentioned above, with waste water 12 preheatings and/or oxidation digestion gas is discharged into the digester gas flow channel 96 that is connected with gas compressor 97.Need be with digestion gas compression, the heat of digestion gas preferably be increased to the degree that adapts with in preferred embodiments rock gas 42 so that being produced capacity.With after the digestion gas compression, it flows to pipe burner 64 by digester gas flow channel 98 in compressor 97, and it mixes with the rock gas 42 from natural gas flow channel 44 in this preferred embodiment there.In optional embodiment, compressor 97 is deleted from design, and preferably has from container 95 to pipe burner 64 single uncrossed digester gas flow channel.
Fig. 4 illustrates and utilizes digestion gas another embodiment as the additional heating source of the working fluid that is used for power generation sub-system, and wherein digestion gas directly mixes with the natural gas fuel source 42 of this preferred embodiment.Digestion gas flows out from container 95 by digester gas flow channel 99 and enters gas compressor 100.With after the digestion gas compression, it directly flows in the gas source 42 by digester gas flow channel 101 in this preferred embodiment in compressor 100.In this embodiment, digestion gas mixes with the working fluid of turbo machine 56 upstreams.In some cases, digestion gas is imported turbo machine 56 can bring the danger that damages turbo machine and/or may reduce turbine performance, the embodiment of Fig. 3 is better than the embodiment of Fig. 4 in this case.But when not existing digestion gas to damage turbo machine dangerous (perhaps when this danger can be ignored), the embodiment of Fig. 4 is preferred in some cases.In optional embodiment, compressor 100 is deletion from design, preferably has the single uncrossed natural gas flow channel of the natural gas fuel source 42 from container 95 to this preferred embodiment.
Though in certain preferred embodiments and embodiment, describe the present invention, but those of ordinary skills it being understood that the present invention and extend beyond these concrete embodiments that disclose to other optional embodiment and/or purposes of the present invention and conspicuous change and equivalent.In addition, except above-mentioned explanation, each feature of the present invention can be used separately or be used in combination with further feature of the present invention.Therefore, disclosed here scope of the present invention should not be subjected to the restriction of above-mentioned specific embodiments, but should determine by claim below the just understanding.
Claims (16)
1. method that is used for produce power and water is carried out pasteurization, it comprises:
Produce electric energy in the mode that generates heat;
Utilize described heat by described heat being carried in first chamber that is heated two internal chamber of on fluid, separating that enter into heat exchanger in the fluid, described chamber is configured to allow carry out heat exchange being heated between the waste water in fluid and second chamber in these two chambers in first chamber, and the temperature that is heated fluid in first chamber is higher than the temperature of waste water being carried out pasteurization;
Allow waste water flow through second chamber of described heat exchanger, the temperature of described waste water is lower than the pasturisation temp of waste water during beginning;
The waste water of second chamber of flowing through is absorbed from the heat that is heated fluid that is positioned at first chamber;
Control flows is through the flow velocity of the waste water of second chamber of described heat exchanger, thereby makes the temperature of waste water be increased to the pasturisation temp of waste water, and makes the heated waste water in described heat exchanger carry out pasteurization,
Wherein, described heat exchanger is second heat exchanger, and described method also comprises:
Make waste water flow first chamber in two internal chamber of on fluid, separating of first heat exchanger without pasteurization from waste water source, and make in second chamber that is present in described second heat exchanger be heated and through second chamber of waste water flow in two chambers of described first heat exchanger of pasteurization, the chamber of described first heat exchanger be configured to allow in first chamber of this first heat exchanger without being heated and between the waste water of pasteurization, carrying out heat exchange in second chamber of pasteurization waste water and this first heat exchanger, and first chamber of described first heat exchanger that allows to flow through without pasteurization waste water being heated and absorbing heat in second chamber of this first heat exchanger through the waste water of pasteurization; And
Make interior the flowing in second chamber of second heat exchanger from first heat exchanger of first chamber of described first heat exchanger, thereby this waste water without pasteurization was partly heated before entering second heat exchanger without pasteurization waste water.
2. the method for claim 1 is characterized in that, the turbogenerator that use to drive a power generator generates energy, and the described heated fluid working fluid that is this turbogenerator.
3. method as claimed in claim 2 also is included in working fluid and flows to turbogenerator before with its heating.
4. method as claimed in claim 3 is characterized in that, the heating of described working fluid comprises working fluid is mixed with the gas fuel of lighting.
5. method as claimed in claim 4 also is included in gas fuel with before working fluid mixes, and in gas compressor gas fuel is compressed.
6. method as claimed in claim 3 is characterized in that, heats described working fluid and comprises the heat that makes described working fluid absorb the coal of spontaneous combustion.
7. method as claimed in claim 3 is characterized in that, heats described working fluid and comprises and make described working fluid absorb nuclear energy.
8. method as claimed in claim 2, be included in also that described working fluid leaves after the described turbogenerator and before it enters first chamber of heat exchanger with its heating.
9. the method for claim 1 is characterized in that, described pasturisation temp is 150-170 °F.
10. the method for claim 1 is characterized in that, described pasturisation temp is at least 160 °F.
11. the method for claim 1 comprises that also the water of second chamber that makes the heat exchanger of flowing through kept for 5 seconds at least under at least 160 temperature.
12. the method for claim 1 comprises that also the energy that whenever produces 1MW can carry out pasteurization at least 200,000 gallon water.
13. the method for claim 1 comprises that also the energy that whenever produces 1MW can carry out pasteurization at least 500,000 gallon water.
14. method as claimed in claim 2 also comprises:
It is heated and oxidation before second chamber of heat exchanger at current, thereby make water discharge digestion gas;
Digestion gas is mixed with working fluid; And
Light this digestion gas under the situation of working fluid existing, thereby make this digestion gas apply heat to working fluid.
15. method as claimed in claim 14 also is included in the described step that digestion gas is mixed with working fluid and before digestion gas is mixed with rock gas.
16. method as claimed in claim 14 also is included in the described step that described digestion gas is mixed with working fluid and compresses described digestion gas before.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US42706902P | 2002-11-18 | 2002-11-18 | |
| US60/427,069 | 2002-11-18 | ||
| US60/509,914 | 2003-10-08 |
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| Publication Number | Publication Date |
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| CN1714230A CN1714230A (en) | 2005-12-28 |
| CN100436781C true CN100436781C (en) | 2008-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2003801035830A Expired - Fee Related CN100436781C (en) | 2002-11-18 | 2003-11-14 | System and method for water pasteurization and power generation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9664140B2 (en) * | 2015-09-23 | 2017-05-30 | Pasteurization Technology Group Inc. | Combined heat and power system with electrical and thermal energy storage |
| EP3542107B1 (en) | 2016-11-18 | 2022-04-06 | Wts Llc | Digital fluid heating system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3213001A (en) * | 1961-08-25 | 1965-10-19 | Escher Wyss Ag | Closed-circuit thermal power plant and flash distillation unit |
| US4094747A (en) * | 1976-05-14 | 1978-06-13 | Bbc Brown, Boveri & Company Limited | Thermal power station combined with a plant for seawater desalination |
| US4571949A (en) * | 1985-04-18 | 1986-02-25 | Moke Harold C | Cogeneration and sludge drying system |
| US5366514A (en) * | 1992-12-30 | 1994-11-22 | Texas Brine Corporation | Salt plant evaporation |
| DE19630058A1 (en) * | 1996-07-25 | 1998-01-29 | Ormat Ind Ltd | Seasonally configured combined cycle thermal power station for remote heat supply system |
-
2003
- 2003-11-14 CN CNB2003801035830A patent/CN100436781C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3213001A (en) * | 1961-08-25 | 1965-10-19 | Escher Wyss Ag | Closed-circuit thermal power plant and flash distillation unit |
| US4094747A (en) * | 1976-05-14 | 1978-06-13 | Bbc Brown, Boveri & Company Limited | Thermal power station combined with a plant for seawater desalination |
| US4571949A (en) * | 1985-04-18 | 1986-02-25 | Moke Harold C | Cogeneration and sludge drying system |
| US5366514A (en) * | 1992-12-30 | 1994-11-22 | Texas Brine Corporation | Salt plant evaporation |
| DE19630058A1 (en) * | 1996-07-25 | 1998-01-29 | Ormat Ind Ltd | Seasonally configured combined cycle thermal power station for remote heat supply system |
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| CN1714230A (en) | 2005-12-28 |
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